/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 18:09:40,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 18:09:40,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 18:09:40,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 18:09:40,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 18:09:40,503 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 18:09:40,504 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 18:09:40,516 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 18:09:40,518 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 18:09:40,519 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 18:09:40,520 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 18:09:40,522 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 18:09:40,522 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 18:09:40,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 18:09:40,525 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 18:09:40,526 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 18:09:40,527 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 18:09:40,528 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 18:09:40,530 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 18:09:40,532 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 18:09:40,534 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 18:09:40,537 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 18:09:40,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 18:09:40,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 18:09:40,543 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 18:09:40,546 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 18:09:40,547 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 18:09:40,548 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 18:09:40,549 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 18:09:40,550 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 18:09:40,551 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 18:09:40,552 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 18:09:40,552 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 18:09:40,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 18:09:40,553 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 18:09:40,554 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 18:09:40,555 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 18:09:40,582 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 18:09:40,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 18:09:40,583 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 18:09:40,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 18:09:40,584 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 18:09:40,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 18:09:40,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 18:09:40,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 18:09:40,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 18:09:40,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 18:09:40,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 18:09:40,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 18:09:40,586 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 18:09:40,586 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 18:09:40,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 18:09:40,587 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 18:09:40,587 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 18:09:40,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 18:09:40,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 18:09:40,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 18:09:40,588 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 18:09:40,588 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 18:09:40,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 18:09:40,589 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 18:09:40,589 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 18:09:40,589 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 18:09:40,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 18:09:40,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 18:09:40,962 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 18:09:40,963 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 18:09:40,964 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 18:09:40,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound100.c [2021-01-06 18:09:41,060 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/866c18c64/02a29b905f4e4e298aed99bb1898321f/FLAG964e10bd7 [2021-01-06 18:09:41,739 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 18:09:41,740 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound100.c [2021-01-06 18:09:41,749 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/866c18c64/02a29b905f4e4e298aed99bb1898321f/FLAG964e10bd7 [2021-01-06 18:09:42,101 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/866c18c64/02a29b905f4e4e298aed99bb1898321f [2021-01-06 18:09:42,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 18:09:42,111 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 18:09:42,116 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 18:09:42,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 18:09:42,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 18:09:42,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 06:09:42" (1/1) ... [2021-01-06 18:09:42,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ab33c1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:42, skipping insertion in model container [2021-01-06 18:09:42,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 06:09:42" (1/1) ... [2021-01-06 18:09:42,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 18:09:42,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 18:09:42,296 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound100.c[520,533] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~t~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~t~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] [2021-01-06 18:09:42,315 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 18:09:42,325 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 18:09:42,339 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound100.c[520,533] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~t~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~t~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] [2021-01-06 18:09:42,347 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 18:09:42,363 INFO L208 MainTranslator]: Completed translation [2021-01-06 18:09:42,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:42 WrapperNode [2021-01-06 18:09:42,364 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 18:09:42,365 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 18:09:42,366 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 18:09:42,366 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 18:09:42,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:42" (1/1) ... [2021-01-06 18:09:42,383 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:42" (1/1) ... [2021-01-06 18:09:42,405 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 18:09:42,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 18:09:42,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 18:09:42,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 18:09:42,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:42" (1/1) ... [2021-01-06 18:09:42,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:42" (1/1) ... [2021-01-06 18:09:42,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:42" (1/1) ... [2021-01-06 18:09:42,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:42" (1/1) ... [2021-01-06 18:09:42,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:42" (1/1) ... [2021-01-06 18:09:42,426 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:42" (1/1) ... [2021-01-06 18:09:42,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:42" (1/1) ... [2021-01-06 18:09:42,429 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 18:09:42,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 18:09:42,431 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 18:09:42,431 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 18:09:42,432 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 18:09:42,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 18:09:42,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 18:09:42,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 18:09:42,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 18:09:43,050 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 18:09:43,051 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-01-06 18:09:43,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 06:09:43 BoogieIcfgContainer [2021-01-06 18:09:43,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 18:09:43,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 18:09:43,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 18:09:43,063 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 18:09:43,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 06:09:42" (1/3) ... [2021-01-06 18:09:43,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@255f7a9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 06:09:43, skipping insertion in model container [2021-01-06 18:09:43,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:42" (2/3) ... [2021-01-06 18:09:43,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@255f7a9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 06:09:43, skipping insertion in model container [2021-01-06 18:09:43,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 06:09:43" (3/3) ... [2021-01-06 18:09:43,067 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound100.c [2021-01-06 18:09:43,074 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 18:09:43,079 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2021-01-06 18:09:43,116 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-01-06 18:09:43,144 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 18:09:43,145 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 18:09:43,145 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 18:09:43,145 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 18:09:43,145 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 18:09:43,145 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 18:09:43,146 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 18:09:43,146 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 18:09:43,162 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2021-01-06 18:09:43,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 18:09:43,168 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:09:43,169 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:09:43,170 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:09:43,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:09:43,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1804972333, now seen corresponding path program 1 times [2021-01-06 18:09:43,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:09:43,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027125177] [2021-01-06 18:09:43,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:09:43,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:09:43,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:09:43,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027125177] [2021-01-06 18:09:43,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 18:09:43,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 18:09:43,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743737067] [2021-01-06 18:09:43,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 18:09:43,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:09:43,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 18:09:43,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 18:09:43,369 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2021-01-06 18:09:43,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:09:43,390 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2021-01-06 18:09:43,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 18:09:43,392 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2021-01-06 18:09:43,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:09:43,402 INFO L225 Difference]: With dead ends: 63 [2021-01-06 18:09:43,402 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 18:09:43,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 18:09:43,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 18:09:43,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-01-06 18:09:43,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 18:09:43,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-01-06 18:09:43,445 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 7 [2021-01-06 18:09:43,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:09:43,446 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-01-06 18:09:43,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 18:09:43,446 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-01-06 18:09:43,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 18:09:43,447 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:09:43,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:09:43,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 18:09:43,448 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:09:43,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:09:43,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1806819375, now seen corresponding path program 1 times [2021-01-06 18:09:43,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:09:43,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129828491] [2021-01-06 18:09:43,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:09:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:09:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:09:43,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129828491] [2021-01-06 18:09:43,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 18:09:43,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 18:09:43,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852189774] [2021-01-06 18:09:43,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 18:09:43,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:09:43,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 18:09:43,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 18:09:43,647 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 4 states. [2021-01-06 18:09:43,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:09:43,863 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-01-06 18:09:43,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 18:09:43,864 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-01-06 18:09:43,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:09:43,867 INFO L225 Difference]: With dead ends: 54 [2021-01-06 18:09:43,867 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 18:09:43,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 18:09:43,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 18:09:43,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2021-01-06 18:09:43,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 18:09:43,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-01-06 18:09:43,889 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 7 [2021-01-06 18:09:43,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:09:43,890 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-01-06 18:09:43,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 18:09:43,891 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-01-06 18:09:43,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 18:09:43,892 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:09:43,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:09:43,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 18:09:43,896 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:09:43,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:09:43,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1186787538, now seen corresponding path program 1 times [2021-01-06 18:09:43,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:09:43,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959963915] [2021-01-06 18:09:43,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:09:43,939 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:09:43,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2105448245] [2021-01-06 18:09:43,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:09:44,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:09:44,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 18:09:44,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:09:44,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:09:44,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959963915] [2021-01-06 18:09:44,150 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:09:44,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105448245] [2021-01-06 18:09:44,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 18:09:44,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 18:09:44,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657100597] [2021-01-06 18:09:44,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 18:09:44,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:09:44,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 18:09:44,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 18:09:44,153 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 6 states. [2021-01-06 18:09:44,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:09:44,335 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2021-01-06 18:09:44,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 18:09:44,336 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2021-01-06 18:09:44,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:09:44,337 INFO L225 Difference]: With dead ends: 51 [2021-01-06 18:09:44,337 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 18:09:44,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 18:09:44,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 18:09:44,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-01-06 18:09:44,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 18:09:44,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-01-06 18:09:44,345 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 9 [2021-01-06 18:09:44,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:09:44,346 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-01-06 18:09:44,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 18:09:44,346 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-01-06 18:09:44,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 18:09:44,347 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:09:44,347 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:09:44,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 18:09:44,562 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:09:44,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:09:44,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1783845574, now seen corresponding path program 1 times [2021-01-06 18:09:44,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:09:44,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122213533] [2021-01-06 18:09:44,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:09:44,580 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:09:44,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [98488604] [2021-01-06 18:09:44,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:09:44,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:09:44,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 18:09:44,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:09:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:09:44,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122213533] [2021-01-06 18:09:44,799 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:09:44,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98488604] [2021-01-06 18:09:44,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:09:44,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 18:09:44,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421819942] [2021-01-06 18:09:44,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 18:09:44,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:09:44,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 18:09:44,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 18:09:44,802 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 5 states. [2021-01-06 18:09:45,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:09:45,011 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2021-01-06 18:09:45,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 18:09:45,012 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2021-01-06 18:09:45,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:09:45,013 INFO L225 Difference]: With dead ends: 61 [2021-01-06 18:09:45,014 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 18:09:45,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 18:09:45,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 18:09:45,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2021-01-06 18:09:45,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 18:09:45,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-01-06 18:09:45,024 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 14 [2021-01-06 18:09:45,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:09:45,024 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-01-06 18:09:45,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 18:09:45,025 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-01-06 18:09:45,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 18:09:45,025 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:09:45,026 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:09:45,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:09:45,239 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:09:45,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:09:45,241 INFO L82 PathProgramCache]: Analyzing trace with hash -583489763, now seen corresponding path program 1 times [2021-01-06 18:09:45,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:09:45,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237340782] [2021-01-06 18:09:45,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:09:45,255 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:09:45,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313617770] [2021-01-06 18:09:45,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:09:45,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:09:45,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 18:09:45,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:09:45,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:09:45,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237340782] [2021-01-06 18:09:45,466 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:09:45,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313617770] [2021-01-06 18:09:45,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:09:45,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 18:09:45,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989884359] [2021-01-06 18:09:45,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 18:09:45,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:09:45,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 18:09:45,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-01-06 18:09:45,469 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 7 states. [2021-01-06 18:09:45,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:09:45,693 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-01-06 18:09:45,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 18:09:45,693 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2021-01-06 18:09:45,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:09:45,694 INFO L225 Difference]: With dead ends: 58 [2021-01-06 18:09:45,694 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 18:09:45,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 18:09:45,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 18:09:45,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-01-06 18:09:45,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 18:09:45,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-01-06 18:09:45,703 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 16 [2021-01-06 18:09:45,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:09:45,703 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-01-06 18:09:45,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 18:09:45,704 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-01-06 18:09:45,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 18:09:45,704 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:09:45,705 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 18:09:45,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:09:45,921 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:09:45,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:09:45,923 INFO L82 PathProgramCache]: Analyzing trace with hash -435278385, now seen corresponding path program 2 times [2021-01-06 18:09:45,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:09:45,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063693188] [2021-01-06 18:09:45,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:09:45,939 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:09:45,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2016352477] [2021-01-06 18:09:45,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:09:46,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 18:09:46,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 18:09:46,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 18:09:46,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:09:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:09:46,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063693188] [2021-01-06 18:09:46,086 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:09:46,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016352477] [2021-01-06 18:09:46,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:09:46,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 18:09:46,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037361062] [2021-01-06 18:09:46,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 18:09:46,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:09:46,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 18:09:46,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-06 18:09:46,089 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 6 states. [2021-01-06 18:09:46,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:09:46,219 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-01-06 18:09:46,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 18:09:46,220 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-01-06 18:09:46,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:09:46,221 INFO L225 Difference]: With dead ends: 68 [2021-01-06 18:09:46,221 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 18:09:46,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 18:09:46,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 18:09:46,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2021-01-06 18:09:46,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 18:09:46,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-01-06 18:09:46,230 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 21 [2021-01-06 18:09:46,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:09:46,231 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-01-06 18:09:46,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 18:09:46,231 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-01-06 18:09:46,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 18:09:46,232 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:09:46,232 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 18:09:46,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:09:46,435 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:09:46,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:09:46,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1690544526, now seen corresponding path program 2 times [2021-01-06 18:09:46,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:09:46,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646271693] [2021-01-06 18:09:46,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:09:46,448 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:09:46,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462298888] [2021-01-06 18:09:46,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:09:46,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 18:09:46,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 18:09:46,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 18:09:46,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:09:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:09:46,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646271693] [2021-01-06 18:09:46,620 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:09:46,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462298888] [2021-01-06 18:09:46,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:09:46,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 18:09:46,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730204737] [2021-01-06 18:09:46,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 18:09:46,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:09:46,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 18:09:46,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 18:09:46,622 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 7 states. [2021-01-06 18:09:46,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:09:46,781 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-01-06 18:09:46,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 18:09:46,781 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2021-01-06 18:09:46,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:09:46,782 INFO L225 Difference]: With dead ends: 64 [2021-01-06 18:09:46,782 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 18:09:46,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 18:09:46,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 18:09:46,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-01-06 18:09:46,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 18:09:46,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-01-06 18:09:46,791 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 23 [2021-01-06 18:09:46,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:09:46,791 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-01-06 18:09:46,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 18:09:46,792 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-01-06 18:09:46,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 18:09:46,793 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:09:46,793 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 18:09:47,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 18:09:47,007 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:09:47,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:09:47,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1115495499, now seen corresponding path program 1 times [2021-01-06 18:09:47,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:09:47,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394097157] [2021-01-06 18:09:47,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:09:47,020 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:09:47,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [316600664] [2021-01-06 18:09:47,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:09:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:09:47,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 18:09:47,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:09:47,184 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:09:47,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394097157] [2021-01-06 18:09:47,185 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:09:47,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316600664] [2021-01-06 18:09:47,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:09:47,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 18:09:47,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720309856] [2021-01-06 18:09:47,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 18:09:47,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:09:47,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 18:09:47,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 18:09:47,188 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 8 states. [2021-01-06 18:09:47,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:09:47,351 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2021-01-06 18:09:47,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 18:09:47,352 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2021-01-06 18:09:47,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:09:47,353 INFO L225 Difference]: With dead ends: 61 [2021-01-06 18:09:47,353 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 18:09:47,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-01-06 18:09:47,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 18:09:47,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-01-06 18:09:47,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 18:09:47,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2021-01-06 18:09:47,361 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 25 [2021-01-06 18:09:47,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:09:47,361 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2021-01-06 18:09:47,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 18:09:47,361 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2021-01-06 18:09:47,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 18:09:47,362 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:09:47,362 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 18:09:47,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:09:47,578 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:09:47,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:09:47,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1559508070, now seen corresponding path program 3 times [2021-01-06 18:09:47,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:09:47,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991416057] [2021-01-06 18:09:47,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:09:47,591 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:09:47,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119595103] [2021-01-06 18:09:47,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:09:47,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 18:09:47,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 18:09:47,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 18:09:47,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:09:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 18:09:47,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991416057] [2021-01-06 18:09:47,736 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:09:47,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119595103] [2021-01-06 18:09:47,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:09:47,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 18:09:47,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504619908] [2021-01-06 18:09:47,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 18:09:47,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:09:47,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 18:09:47,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 18:09:47,738 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 6 states. [2021-01-06 18:09:47,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:09:47,819 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-01-06 18:09:47,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 18:09:47,819 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2021-01-06 18:09:47,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:09:47,820 INFO L225 Difference]: With dead ends: 50 [2021-01-06 18:09:47,820 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 18:09:47,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-01-06 18:09:47,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 18:09:47,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-01-06 18:09:47,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 18:09:47,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2021-01-06 18:09:47,828 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 28 [2021-01-06 18:09:47,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:09:47,828 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2021-01-06 18:09:47,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 18:09:47,828 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2021-01-06 18:09:47,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 18:09:47,829 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:09:47,829 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 18:09:48,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:09:48,034 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:09:48,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:09:48,036 INFO L82 PathProgramCache]: Analyzing trace with hash 256486781, now seen corresponding path program 3 times [2021-01-06 18:09:48,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:09:48,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799214287] [2021-01-06 18:09:48,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:09:48,046 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:09:48,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [273691111] [2021-01-06 18:09:48,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:09:48,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 18:09:48,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 18:09:48,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 18:09:48,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:10:04,164 WARN L197 SmtUtils]: Spent 10.69 s on a formula simplification that was a NOOP. DAG size: 26 [2021-01-06 18:10:18,965 WARN L197 SmtUtils]: Spent 6.38 s on a formula simplification that was a NOOP. DAG size: 18 [2021-01-06 18:10:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 18:10:21,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799214287] [2021-01-06 18:10:21,006 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:10:21,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273691111] [2021-01-06 18:10:21,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:10:21,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 18:10:21,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175063970] [2021-01-06 18:10:21,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 18:10:21,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:10:21,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 18:10:21,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=62, Unknown=7, NotChecked=0, Total=90 [2021-01-06 18:10:21,008 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 10 states. [2021-01-06 18:10:30,604 WARN L197 SmtUtils]: Spent 9.57 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-01-06 18:10:40,133 WARN L197 SmtUtils]: Spent 9.51 s on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-01-06 18:10:52,259 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~a~0))) (and (= c_ULTIMATE.start_main_~s~0 (+ c_ULTIMATE.start_main_~t~0 .cse0)) (= (+ (* 2 (* c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~s~0)) (* 2 .cse0) (* 2 c_ULTIMATE.start_main_~s~0)) (+ (* c_ULTIMATE.start_main_~s~0 c_ULTIMATE.start_main_~s~0) (* c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~a~0) 1)) (let ((.cse1 (= c_ULTIMATE.start_main_~s~0 (+ .cse0 (* 2 c_ULTIMATE.start_main_~a~0) 1)))) (or (and (= 0 c_ULTIMATE.start___VERIFIER_assert_~cond) (not .cse1)) (and (= 1 c_ULTIMATE.start___VERIFIER_assert_~cond) .cse1))) (= (+ (* c_ULTIMATE.start_main_~t~0 c_ULTIMATE.start_main_~t~0) 1) (+ (* 2 c_ULTIMATE.start_main_~t~0) (* 4 .cse0))))) is different from false [2021-01-06 18:11:02,428 WARN L197 SmtUtils]: Spent 10.13 s on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-01-06 18:11:04,731 WARN L197 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 33 [2021-01-06 18:11:10,570 WARN L197 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2021-01-06 18:11:19,298 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 25 [2021-01-06 18:11:21,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:11:21,474 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-01-06 18:11:21,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 18:11:21,475 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2021-01-06 18:11:21,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:11:21,475 INFO L225 Difference]: With dead ends: 46 [2021-01-06 18:11:21,476 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 18:11:21,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 80.3s TimeCoverageRelationStatistics Valid=79, Invalid=188, Unknown=9, NotChecked=30, Total=306 [2021-01-06 18:11:21,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 18:11:21,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-01-06 18:11:21,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 18:11:21,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-01-06 18:11:21,485 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2021-01-06 18:11:21,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:11:21,485 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-01-06 18:11:21,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 18:11:21,486 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-01-06 18:11:21,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 18:11:21,486 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:11:21,487 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 18:11:21,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 18:11:21,702 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:11:21,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:11:21,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1670816768, now seen corresponding path program 2 times [2021-01-06 18:11:21,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:11:21,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440101370] [2021-01-06 18:11:21,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:11:21,714 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:11:21,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229037427] [2021-01-06 18:11:21,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:11:21,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 18:11:21,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 18:11:21,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 18:11:21,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:11:21,978 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-01-06 18:11:21,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440101370] [2021-01-06 18:11:21,978 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:11:21,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229037427] [2021-01-06 18:11:21,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 18:11:21,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-06 18:11:21,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600709213] [2021-01-06 18:11:21,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 18:11:21,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:11:21,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 18:11:21,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-01-06 18:11:21,981 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 8 states. [2021-01-06 18:11:26,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:11:26,268 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-01-06 18:11:26,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 18:11:26,268 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2021-01-06 18:11:26,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:11:26,269 INFO L225 Difference]: With dead ends: 33 [2021-01-06 18:11:26,269 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 18:11:26,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-01-06 18:11:26,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 18:11:26,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 18:11:26,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 18:11:26,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 18:11:26,270 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2021-01-06 18:11:26,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:11:26,271 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 18:11:26,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 18:11:26,271 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 18:11:26,271 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 18:11:26,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:11:26,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 18:11:38,744 WARN L197 SmtUtils]: Spent 12.12 s on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-01-06 18:12:12,592 WARN L197 SmtUtils]: Spent 33.84 s on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-01-06 18:12:27,323 WARN L197 SmtUtils]: Spent 14.73 s on a formula simplification. DAG size of input: 54 DAG size of output: 32